JPH0854087A - Mechanical type pipe coupling - Google Patents
Mechanical type pipe couplingInfo
- Publication number
- JPH0854087A JPH0854087A JP20607594A JP20607594A JPH0854087A JP H0854087 A JPH0854087 A JP H0854087A JP 20607594 A JP20607594 A JP 20607594A JP 20607594 A JP20607594 A JP 20607594A JP H0854087 A JPH0854087 A JP H0854087A
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- pipe
- seal member
- joint body
- joint
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000008878 coupling Effects 0.000 title abstract 6
- 238000010168 coupling process Methods 0.000 title abstract 6
- 238000005859 coupling reaction Methods 0.000 title abstract 6
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 48
- 239000010959 steel Substances 0.000 claims abstract description 48
- 238000012856 packing Methods 0.000 claims abstract description 18
- 230000002093 peripheral effect Effects 0.000 claims abstract description 14
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 230000007797 corrosion Effects 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 238000003780 insertion Methods 0.000 abstract description 2
- 230000037431 insertion Effects 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 7
- 238000007789 sealing Methods 0.000 description 6
- 239000004698 Polyethylene Substances 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000012966 insertion method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Landscapes
- Joints With Pressure Members (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、内面に防食用の樹脂層
を被覆した内面ライニング鋼管用のメカニカル形管継手
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanical type pipe joint for an inner lining steel pipe having an inner surface coated with a resin layer for corrosion protection.
【０００２】[0002]
【従来の技術】給水などの配管では、赤水対策の観点か
ら、耐食性に富んだ樹脂ライニング管の使用が一般化
し、又、そのための管継手が開発されている。尚、一般
に、樹脂ライニング管即ち内面ライニング鋼管は、内面
を塩化ビニル樹脂で被覆、あるいは内面をポリエチレン
等の粉体で塗装し、外面を亜鉛メッキあるいは軽度防食
塗装のみを施した構成を有す。2. Description of the Related Art In piping for water supply and the like, from the viewpoint of measures against red water, the use of resin lining pipes having high corrosion resistance has become popular, and pipe joints therefor have been developed. Generally, a resin-lined pipe, that is, an inner-lined steel pipe, has a configuration in which the inner surface is coated with a vinyl chloride resin, or the inner surface is coated with a powder of polyethylene or the like, and the outer surface is subjected to only galvanization or mild anticorrosion coating.
【０００３】身近な水道用内面ライニング鋼管について
例をとると、たとえば、外面腐食などにより、損傷した
管の部分を交替する作業のため、一本の水道管の一部が
切断除去され、その部分に新しい内面ライニング鋼管を
配することが行なわれる。この場合、既設管と新しい管
とをメカニカル形管継手を用いて接続する。既設管の部
分は固定された状態となっているので、継手を既設管の
端部に挿通し、新管を既設管の間に挿入し、継手を新管
の方にずらして接続するいわゆる抜き挿し工法が行なわ
れている。[0003] For example, in the case of a familiar inner lining steel pipe for water supply, for example, a part of one water pipe is cut and removed in order to replace a part of the pipe damaged by external corrosion or the like. A new inner lining steel pipe. In this case, the existing pipe and the new pipe are connected using a mechanical type pipe joint. Since the existing pipe is fixed, insert the joint into the end of the existing pipe, insert the new pipe between the existing pipes, and shift the joint toward the new pipe to connect. An insertion method is being used.
【０００４】図３に従来タイプの継手の例を示す。内面
にライニング２を施した鋼管１の切断面３からの腐食を
防止するために、管端に合成樹脂製の防食コア４を装着
させる。防食コア４のフランジ外周面にＯ−リング５あ
るいはＵパッキンを配す。継手６は、円筒状の本体７、
継手本体７の両端に配される対のパッキン８、ワッシャ
ー１０および継手本体７の両端に螺合する袋ナット９と
を備え、パッキン８の内径を鋼管１の外径より小とさせ
る構成である。施工に際して、切断された鋼管１の端部
にＯ−リング５付きの防食コア４を装着し、鋼管１の外
周面に沿って、袋ナット９、パッキン８、ワッシャー１
０とを配し、次いで、継手本体７を接続されようとする
両鋼管１の端部をまたぐように配し、袋ナット９を継手
本体７方向へ移動させ、パッキン８を継手本体７内へ押
込みながら、袋ナット９を継手本体７へ螺着させる。FIG. 3 shows an example of a conventional type joint. In order to prevent corrosion from the cut surface 3 of the steel pipe 1 having the lining 2 on the inner surface, an anticorrosion core 4 made of synthetic resin is attached to the pipe end. The O-ring 5 or U packing is arranged on the outer peripheral surface of the flange of the anticorrosion core 4. The joint 6 includes a cylindrical main body 7,
A pair of packings 8, a washer 10, and a cap nut 9 screwed to both ends of the joint body 7 are provided at both ends of the joint body 7, and the inner diameter of the packing 8 is smaller than the outer diameter of the steel pipe 1. . At the time of construction, an anticorrosion core 4 with an O-ring 5 is attached to the cut end of the steel pipe 1, and a cap nut 9, a packing 8, a washer 1 are provided along the outer peripheral surface of the steel pipe 1.
0, and then the joint body 7 is arranged so as to straddle both ends of the steel pipes 1 to be connected, the cap nut 9 is moved toward the joint body 7, and the packing 8 is inserted into the joint body 7. The cap nut 9 is screwed onto the joint body 7 while being pushed.
【０００５】[0005]
【発明が解決しようとする課題】前述した如く、鋼管の
接続は、袋ナット、ワッシャー、パッキンを予め接続さ
れようとする鋼管に挿入及び防食コアを鋼管の切断面に
配した後、継手本体を鋼管に挿通させ、新管を切断され
た鋼管の間に配するとともに、新管側にも、袋ナット、
ワッシャー、パッキンが挿入されているので、継手本体
を新管側にずらし、両袋ナットを継手本体に締めつける
ことで、新管と鋼管の接続を行ない図３に示す継手形態
を得る手法である。このような作業の際、Ｏ−リングが
損傷したり、位置ずれが生じたり、又、製造、組付け誤
差によりシール圧が充分に確保されず、Ｏ−リングの部
分から水洩れし、継手本体の内周面を腐食させる原因と
なる。それ故に、本発明は、前述した従来技術の不具合
を解消させることを解決すべき課題とする。As described above, a steel pipe is connected by inserting a cap nut, a washer, and a packing into a steel pipe to be connected in advance and disposing an anticorrosion core on a cut surface of the steel pipe. The new pipe is inserted between the steel pipes, and the new pipe is placed between the cut steel pipes.
Since the washer and the packing are inserted, the joint main body is shifted to the new pipe side, and the two pipe nuts are tightened to the joint main body, thereby connecting the new pipe and the steel pipe to obtain the joint form shown in FIG. During such work, the O-ring may be damaged or displaced, or the sealing pressure may not be sufficiently ensured due to manufacturing or assembly errors, and water may leak from the O-ring portion, and the joint body may be damaged. It causes corrosion of the inner peripheral surface. Therefore, an object of the present invention is to solve the above-mentioned disadvantages of the related art.
【０００６】[0006]
【課題を解決させるための手段】本発明は、前述した課
題を解決するために、基本的には、継手本体の内周面に
防食ライニング層を設け、このライニング層に接するシ
ール部を有するシール部材を管端に配する手段を用い
る。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention basically provides a joint body having an anticorrosion lining layer provided on an inner peripheral surface thereof, and a seal having a seal portion in contact with the lining layer. Means for arranging the member at the pipe end is used.
【０００７】好ましくは、シール部として複数個の突片
又は水膨潤材のものを用いる。[0007] Preferably, a plurality of projecting pieces or a water-swelling material is used as the seal portion.
【０００８】[0008]
【作用】シール部材のシール部は、継手本体の鋼管への
ずらしの際、継手本体により弾性変形して損傷を受ける
ことなく、或いは、水膨潤材の場合にはシール部が継手
本体に接することがないのでシール部の損傷はなく、水
密効果を高く維持できる。The seal portion of the seal member is elastically deformed by the joint body when the joint body is displaced from the steel pipe and is not damaged, or in the case of a water swelling material, the seal portion contacts the joint body. Since there is no seal, there is no damage to the seal portion, and the watertight effect can be maintained high.
【０００９】[0009]
【実施例】図１を参照する。継手１１は、その内周面に
防食樹脂ライニング層２２を付した鋳鉄製の円筒状の継
手本体１２を有す。継手本体１２の両側部内側にテーパ
面１３を設け、このテーパ面１３に接するようパッキン
１４を配す。ゴム材からなるパッキン１４は、筒状でそ
の内径は接続されようとする内面ライニング鋼管１５の
外径より小でありかつその長さは自由状態でその一部が
継手本体１２より一部突出する寸法とする。継手本体１
２の両側部外側に袋ナット１６をワッシャ１０を介在さ
せて螺着させる。DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. The joint 11 has a cylindrical joint body 12 made of cast iron with an anticorrosion resin lining layer 22 provided on the inner peripheral surface thereof. A tapered surface 13 is provided inside both sides of the joint body 12, and a packing 14 is arranged so as to be in contact with the tapered surface 13. The packing 14 made of a rubber material has a cylindrical shape, the inner diameter of which is smaller than the outer diameter of the inner lining steel pipe 15 to be connected, and the length thereof is free and a part of the packing 14 projects from the joint body 12. Dimensions. Fitting body 1
A cap nut 16 is screwed to the outside of both sides of 2 with the washer 10 interposed.
【００１０】内周面に、ポリエチレン粉体塗装層或いは
塩化ビニル樹脂層１７を有する鋼管１５の先端切断面に
合成樹脂製のシール部材１８を装着する。シール部材１
８は、鋼管１７内に水密的に挿入される筒部１９と、筒
部１９と一体にして鋼管１５の外径と同外径のフランジ
部２０とからなる。鋼管１５の外面は亜鉛メッキ又は防
食塗装を施されている。A sealing member 18 made of a synthetic resin is mounted on a cutting surface of a steel pipe 15 having a polyethylene powder coating layer or a vinyl chloride resin layer 17 on the inner peripheral surface. Seal member 1
Reference numeral 8 denotes a tubular portion 19 which is inserted into the steel pipe 17 in a watertight manner, and a flange portion 20 which is integrated with the tubular portion 19 and has the same outer diameter as the outer diameter of the steel pipe 15. The outer surface of the steel pipe 15 is subjected to galvanization or anticorrosion coating.
【００１１】シール部材１８はそのフランジ部２０の外
周面に弾性変形可能な複数個の突片２１を有する。突片
２１は、長手方向に離間して、好ましくは、断面三角形
状のもので、径方向にも弾性変形自在とさせる。The seal member 18 has a plurality of projecting pieces 21 which can be elastically deformed on the outer peripheral surface of the flange portion 20. The projecting pieces 21 are spaced apart in the longitudinal direction, preferably have a triangular cross section, and are elastically deformable also in the radial direction.
【００１２】袋ナット１６、ワッシャ１０、パッキン１
４を鋼管１５、１５の端部に挿入し、シール部材１８を
両鋼管１５、１５の端部に装着する。シール部材１８の
筒部１９は、水が鋼管１５とシール部材１８との間から
外部へ洩れるのを防止するよう鋼管１５の内周面に水密
的に挿入される。一方の鋼管１５へ継手本体１２を挿入
し、次いで、他方の鋼管１５へずらし、両鋼管１５、１
５を継手本体１２がまたぐようにする。その後、袋ナッ
ト１６を継手本体１２の側部に螺着させ、図１の状態を
得る。この作業中の継手本体１２の一方の鋼管１５への
挿入及び他方の鋼管１５へのずらし時、突片２１が、防
食ライニング２２に接触しながら、径方向と長手方向に
弾性変形し、防食ライニング層２２に対するシール圧を
確保する。この作業時、突片２１に対する損傷はみられ
ない。[0012] Cap nut 16, washer 10, packing 1
4 is inserted into the ends of the steel pipes 15, 15, and the sealing member 18 is attached to the ends of the steel pipes 15, 15. The cylindrical portion 19 of the seal member 18 is watertightly inserted into the inner peripheral surface of the steel pipe 15 so as to prevent water from leaking from between the steel pipe 15 and the seal member 18 to the outside. The joint body 12 is inserted into one of the steel pipes 15 and then shifted to the other steel pipe 15, so that the two steel pipes 15, 1
5 so that the joint body 12 straddles. Thereafter, the cap nut 16 is screwed to the side of the joint body 12 to obtain the state shown in FIG. When the joint body 12 is inserted into one of the steel pipes 15 and shifted to the other steel pipe 15 during this operation, the protruding pieces 21 are elastically deformed in the radial direction and the longitudinal direction while being in contact with the anticorrosion linings 22. Ensuring a sealing pressure on the layer 22. At this time, no damage to the projecting piece 21 is observed.
【００１３】パッキン１４の内径を鋼管１５、１５の外
径より大とし、図１の使用時には、ワッシャ１０の押圧
力を受けて、径方向内方へと膨出して、鋼管１５、１５
の外周面にパッキン１４を密接させることもできる。こ
の場合、パッキン１４とワッシャ１０を継手本体１２に
配したものを袋ナット１６で仮止めし、一方の鋼管１５
に挿入した後他方の鋼管１５へずらした後、継手本体１
２に袋ナット１６を本締めする。The inner diameter of the packing 14 is made larger than the outer diameter of the steel pipes 15, 15. In use in FIG. 1, the packing 14 swells radially inward under the pressing force of the washer 10, and swells inward in the radial direction.
The packing 14 can be closely contacted with the outer peripheral surface of. In this case, the one in which the packing 14 and the washer 10 are arranged on the joint body 12 is temporarily fixed with the cap nut 16 and the one steel pipe 15
And then shifted to the other steel pipe 15, the joint body 1
Then, the cap nut 16 is fully tightened.
【００１４】図２に示す例は、図１とシール部材２１を
除いて同一構成なので同一引照番号を付してその説明を
省略する。図２のシール部材２１はそのフランジ部２０
の外周面の溝に水膨潤材からなる円環部材２１′を配し
た構造を有す。円環部材２１′は、水を含むと膨出し、
継手本体１２の防食ライニング層２２に密着し、シール
効果を高める。The example shown in FIG. 2 has the same structure as that of FIG. 1 except for the seal member 21, so that the same reference numerals are assigned and the description thereof will be omitted. The sealing member 21 shown in FIG.
Has a structure in which an annular member 21 'made of a water-swelling material is arranged in a groove on the outer peripheral surface of the ring. The annular member 21 'swells when containing water,
It adheres tightly to the anticorrosion lining layer 22 of the joint body 12 to enhance the sealing effect.
【００１５】[0015]
【効果】シール部材のシール部の弾性変形による管挿入
抵抗の小さい本発明の継手は、いわゆる抜き挿し工法に
も適用可能であり、鋼管の切断面および外周面の防食効
果が大きい。The joint of the present invention, which has a small pipe insertion resistance due to elastic deformation of the seal portion of the seal member, can be applied to a so-called pull-out method, and has a large anticorrosion effect on the cut surface and the outer peripheral surface of the steel pipe.
【図１】本発明の一例の継手の断面図である。FIG. 1 is a sectional view of a joint according to an example of the present invention.
【図２】本発明の別の例の継手の断面図である。FIG. 2 is a sectional view of a joint according to another example of the present invention.
【図３】従来例の継手の断面図である。FIG. 3 is a sectional view of a conventional joint.
１１ 継手 １２ 継手本体 １４ パッキン １５ 鋼管 １６ 袋ナット １８ シール部材 ２０ フランジ部 ２１ シール部 DESCRIPTION OF SYMBOLS 11 Joint 12 Joint main body 14 Packing 15 Steel pipe 16 Cap nut 18 Seal member 20 Flange part 21 Seal part
Claims (3)
円筒状の継手本体と、該継手本体の両側部内側に配され
るパッキンと、接続されようとする鋼管の両側部を覆い
かつ継手本体の両側部外側に螺合する袋ナットと、およ
び接続されようとする鋼管の切断面より管内面ライニン
グ層に対し水密に管内に嵌入される円筒部および鋼管の
切断面に接するフランジ部とを備えるシール部材とを有
し、シール部材のフランジ部外周面に継手本体の防食樹
脂ライニング層と接するシール部を設けていることを特
徴とするメカニカル形管継手。1. A joint body having a cylindrical joint body having an anticorrosion resin lining layer on an inner peripheral part, a packing disposed inside both side parts of the joint body, and a joint body covering both side parts of a steel pipe to be connected. A cap nut screwed to the outside of both sides of the steel pipe, and a cylindrical part fitted into the pipe in a watertight manner from the cut face of the steel pipe to be connected to the pipe inner surface lining layer and a flange part in contact with the cut face of the steel pipe. A mechanical type pipe joint comprising: a seal member; and a seal portion provided on an outer peripheral surface of a flange portion of the seal member in contact with the anticorrosion resin lining layer of the joint body.
の突片からなる請求項１記載のメカニカル形管継手。2. The mechanical type pipe joint according to claim 1, wherein the seal portion comprises a plurality of projecting pieces extending radially outward.
含む請求項１記載のメカニカル形管継手。3. The mechanical type pipe joint according to claim 1, wherein the seal portion includes an annular member made of a water-swelling material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20607594A JPH0854087A (en) | 1994-08-09 | 1994-08-09 | Mechanical type pipe coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20607594A JPH0854087A (en) | 1994-08-09 | 1994-08-09 | Mechanical type pipe coupling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0854087A true JPH0854087A (en) | 1996-02-27 |
Family
ID=16517419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20607594A Pending JPH0854087A (en) | 1994-08-09 | 1994-08-09 | Mechanical type pipe coupling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0854087A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001159482A (en) * | 1999-12-01 | 2001-06-12 | Nippo Valve Co Ltd | Piping pipe provided with pipe end core and mechanical joint for the pipe |
| US6999128B2 (en) | 2000-12-27 | 2006-02-14 | Matsushita Electric Industrial Co., Ltd. | Stillness judging device and scanning line interpolating device having it |
| CN113692782A (en) * | 2019-04-15 | 2021-11-23 | 东芝能源系统株式会社 | Charged particle accelerator and construction method thereof |
| CN117469479A (en) * | 2023-10-27 | 2024-01-30 | 晋城市乐居空间装饰有限公司 | A corrosion-resistant heating steel pipe structure |
-
1994
- 1994-08-09 JP JP20607594A patent/JPH0854087A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001159482A (en) * | 1999-12-01 | 2001-06-12 | Nippo Valve Co Ltd | Piping pipe provided with pipe end core and mechanical joint for the pipe |
| US6999128B2 (en) | 2000-12-27 | 2006-02-14 | Matsushita Electric Industrial Co., Ltd. | Stillness judging device and scanning line interpolating device having it |
| CN113692782A (en) * | 2019-04-15 | 2021-11-23 | 东芝能源系统株式会社 | Charged particle accelerator and construction method thereof |
| CN117469479A (en) * | 2023-10-27 | 2024-01-30 | 晋城市乐居空间装饰有限公司 | A corrosion-resistant heating steel pipe structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS61248991A (en) | Socket joint | |
| EP0009368B1 (en) | Pipe coupling and pipe joint connection | |
| JPS6125957B2 (en) | ||
| JPH0854087A (en) | Mechanical type pipe coupling | |
| JPS6323673Y2 (en) | ||
| JPH0313674Y2 (en) | ||
| JP3044355U (en) | Stopping and water blocking structure in pipe joints | |
| JPH047437Y2 (en) | ||
| GB1576573A (en) | Pipe joints | |
| JP3106386B2 (en) | Pipe end anticorrosion core | |
| JPH047430Y2 (en) | ||
| JPH10332058A (en) | Mechanical type pipe end anticorrosive pipe coupling | |
| JP3015865U (en) | Pipe joint seal structure | |
| JPH07332554A (en) | Mechanical pipe joint | |
| JP7331199B2 (en) | Insulated joint structure | |
| JP3720122B2 (en) | Pipe fitting for repair | |
| JP3319503B2 (en) | Corrosion protection structure at the end of the pipe joint for earthquake resistance | |
| JP2866782B2 (en) | Anticorrosion pipe fittings | |
| JPS582591Y2 (en) | Composite pipe connection | |
| JPH06147376A (en) | Pipe end corrosion-proof flange coupling | |
| JPH0113900Y2 (en) | ||
| JPH0212380Y2 (en) | ||
| JPH0227278Y2 (en) | ||
| JPH0113899Y2 (en) | ||
| JPS5910471Y2 (en) | Connection device between headless pipe and flange pipe |